dv wrote:....I volunteer to help if needed. I am fairly handy with 3DStudio MAX.

that is interesting. We use 3DS too.We have developed an internal tool that converts a 3DS model / scene into our own internal format.Basically you could create and 3D model of the cave and we just easily import it into the scene.Why don't we give it a try? Maybe you could prepare the 3D model for the first 100 meters?